[PATCH] drm/i915: Skip remap_io_mapping() for non-x86 platforms

[Mullati Siva <siva.mullati@xxxxxxxxx>]

The _PAGE_CACHE_MASK macro is not defined in non-x86
architectures and it's been used in remap_io_mapping().
Only hw that supports mappable aperture would hit this path
remap_io_mapping(), So skip this code for non-x86 architectures.

Signed-off-by: Mullati Siva <siva.mullati@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_mm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_mm.c b/drivers/gpu/drm/i915/i915_mm.c
index 666808cb3a32..d76feeaf3fd1 100644
--- a/drivers/gpu/drm/i915/i915_mm.c
+++ b/drivers/gpu/drm/i915/i915_mm.c
@@ -91,6 +91,7 @@ int remap_io_mapping(struct vm_area_struct *vma,
 		     unsigned long addr, unsigned long pfn, unsigned long size,
 		     struct io_mapping *iomap)
 {
+#if IS_ENABLED(CONFIG_X86)
 	struct remap_pfn r;
 	int err;
 
@@ -108,6 +109,7 @@ int remap_io_mapping(struct vm_area_struct *vma,
 		zap_vma_ptes(vma, addr, (r.pfn - pfn) << PAGE_SHIFT);
 		return err;
 	}
+#endif
 
 	return 0;
 }
-- 
2.33.0